GWT Resizable Composite

问题

I'm trying a simple experiment with ResizableComposite by logging width & height of the widget, but I'm not getting any response.

ResizableFlowPanel

public class ResizableFlowPanel extends FlowPanel implements RequiresResize, ProvidesResize {

    public ResizableFlowPanel() {
    super();
    }

    @Override
    public void onResize() {
    GWT.log(this.getOffsetHeight() +","+this.getOffsetWidth());
    }

}

AppBody.java

public class AppBody extends ResizeComposite implements RequiresResize,
    ProvidesResize {
    private static AppBodyUiBinder uiBinder = GWT.create(AppBodyUiBinder.class);

    public AppBody() {
    initWidget(uiBinder.createAndBindUi(this));
    }

    @Override
    public void onResize() {
    GWT.log(this.getOffsetHeight() + "," + this.getOffsetWidth());
    super.onResize();
    }

    interface AppBodyUiBinder extends UiBinder<Widget, AppBody> {
    }

}

AppBody.ui.xml

<ui:UiBinder ...>
    <e:ResizableFlowPanel styleName="{bundle.appBodyStyle.app_body}">

    </e:ResizableFlowPanel>
</ui:UiBinder> 

When I resize the browser, I'm not getting any log messages.

来源：https://stackoverflow.com/questions/14331259/gwt-resizable-composite